poole



May 22, 192s. 1,670,984

L. E. POOLE APPARATUS FOR PRESS FITTING COMMUTATORS UPON ARMATURE SHAFTS Filed Aug. 21, 1926 n www hw Patented May 22, 1928.

UNITED STATES renna;

PATENT OFFICE.

LORA E.VPOOLE, 0F` ANDERSON, INDIANA, `ASSIGNORv BY MESNE ASSIGNMENTS, TO

DELCO-REMY CORPORATION,`OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

APPARATUS FOR PRESS-FITTNG COMMU'TATORS UPON ARMATURE SHAFTS.

Application led'august 21, 1926. seriai No. 130,738.

This invention relates to apparatus for assembling tubular bodies upon shafts and particularly for assembling a commutaton having a tubular hub upon the shaft having a commutator' receiving portion over which the commutator is press-fitted. y f

Itis among the objects of the present invention to provide apparatus for facilitate in the assembling operationreferred to in or er that the cost of this part of the manu? facture of a dynamo elect-ric machine may be reduced. i

Further objects and advantages `of the present invention Vwill be'apparent from the Vfollowing description', reference being had to `the acc'ompanyingv drawings, wherein a preferred formiof embodiment of the present invent-ion is clearly shown. i l

In the drawings: u

Fig. 1 is a fragmentary view in longitudinal section ofapparatus for assembling a shaft and a commutator. i

Fig.` 2 isafcoinposite sectional view on the 4line 2-2 of Fig.

The shaftQO to which the present invention is particularlyadapted is one having a commutator receiving portion 21 adjacent which is a portion 22 o'f smaller diameter` which may provide one of the journals of the shaft. The shaft carries a slotted ar'- mature core 23 carrying a plurality ot'hairpin bar conductors 24, kthe ends of which are arranged in concentric circular rows. The barA ends in the outer' row are desigf nated bynumeral 25 and those in the inner row by the numeral 26. Thus the conductor bar endsare arranged in groups of two ends each, namely the` ends 25 and 26 which extend substantially radially with respect yto the center ofthe core. Each group of two ends is to be attached. to a segment of' a commutator which will now be described.

`The commutator to which the present invention is particularly adapted is designated in its entirety by numeral and includes a plurality of conducting segments 31 each located between u two L-shaped conducting plates 32'having dove-tail tang portions feorresponding to the dove-tail tangs of the segments 31. T'hus each conducting sec tion of the' commutator includes the segment 31 and portions of the L-shaped members 32. Theconducting sections are spaced and in sulated from each other by insulation pieces shaped like the segments `31. The portions 34, 34 of the members 32 which extend from the segment 3l are called riser portions and include between them a space tor receiving one of the groups of conductor bar ends 25 and 26. The conducting sections including segments 31 and plates 32 are insulatingly clamped in assembled position by V-riingsm and a hollow rivet 36 which provides a tubular hub for the commutator and is adapted tobe press-fitted over the commutator rel i within a tubular member 43 provided at its lower end with an annular boss 44 adapted to bear against the upper V-riug ofthe commutator. The tubular member 43 is slidably supported by-a guide 45 which is supported in any suitable manner by a base ftlindicatedat 46. The central bore 47 4of the tube 43 whiehreceives the tube 41 contains va spring 48 bearing againstthe interior ot the tube 43and the upper end of the tube 40 in order to lurge the tube 40 downwardly into the position shown in the drawing. Downward movement oit the tube 40 is lim ited by a set screw 49 engaging the upper end k50ct a slotl provided in the side et the tube 40. A locating bar 52 is attached by screws 52 to the member 43 and is adapted to occupy a space between the pair of riser members 34 in orderto locate a commutator which has beenplaced upon the tube 40 in a definite relation to the tubular member 43. The member43 is prevented from rotating relative tothe guide 45 by a suitable key 53 attached to the guide and cooperating with the groove 54 in the member/43.

The shaft 2O and its armature core 23 are supported in a vertical position and in alignmentwith the tube 40 by means including a socket member having a recess 61 ttor re eeiving the lower end of the shaft Q0, and vertically slidable within a recess 62 in algnnient with the tube 40. The block 60 is yieldingly urgedv ul'iwardly by a spring 63. The armature core 23 is maintained upright and its angular relation to the base 46 and hence to the commutator 30 is determined by a bracket 64 attached' by screws Li6 and having a'half-tubular portion 6G adapted to receive the core 23. carries a longitudinal.V extending rib, 67

adapte-dtorbe, received. by one of the ar1nareadily pass" over the shaft portion 22:.

Wheny the lower end of: the tube 40 engages the shoulder portion/i2 at. the junction of the portions 21 and 22, furthen downward movementof the tube i0 will:` be' prevented;

butthe tube'l1-3y will continueto move down.-

wardly in` order to transfer'thecommutat'or fromi theportion 40 to the commutator nee ceiving. portionQl of; the'shaft. The mem'- ber 43serves'to stripthe commutat'or from t'he'tube 4:0 and alsoltopress the commutator over' the comm'utator receiving portion' 2li. After this operationhasbeen performedithe member 43 is moved upwardly' to the posi;- tion'y shown in Fig; 1. The tube' 40' is also moved upwardly by'movement of the' stripper. 43 until it clears'the upper end ot the shaft. 20' so that: the work' may be.V moved from the workholder and other worleto be assembled maybe placed? in. position.

The spring 63 cushionsthe shock' ofvenfgagement of the commutator' withl the; shaft 22, thus' preventing pounding the lower: end ofthe' shaft/22 uponits'supportf.

While Vthe form of embodiment ofL the present invention as' herein disclosed, constitutes a preferred formait' is to` beunderstood that ot er.' forms might be' adopted, all coming withinv the scope of the claims which. follow;

What is claimed is asfollows:

l1. Apparatus for assembling a commutator having a' tubu'lar'hub upon a shaft having` a commutator receiving portion, comprising in combination, meansy for support'- ing' the shaft; means independent of; the shaft for temporarily supporting the4 coinmutator in alignment withz the shaft and for locating it around the' shaft. and adjacent the' commutator receivingportion thereof; and means for removingthe commutator from the temporary supporting means and for forcing it'along the eommutator receiving por-tion ofthe shaft.

2; Apparatus for assembling' a commutatorhaving'al tubular hub upon'. a' shaft hav- 'ing a commutator receivingV portion and. a portion of smaller' diameter than the' com'- The tubular por-ti on- 66- mutator receiving portion' located' between l ing af commutator receiving.' portion and a. 'portion of'smaller. diameter." than theoolnL mutator' receiving portion. located' between au. end. of the'i shaft' `and the con'imutatonL re. ceiving' portion, compnisin f in combination, means'for supportin the s aft; meansindex pendent' ofV the'l` sha fory temporarily Supporting' the' commutator' in' alignment with the shaft andi for' locating it lanouniflthe*sliir: portion: of smallery diameter; and a: tubular stripping membeny movable'in :alignmentwith the shaft andV a'dapte'dl to' engagonerendi of the commutator and to remove it. from: the

temporary.' holding means and `to fbroethe commutator: along the:r commutaton` receiving portion of the shaft. i Y r 1,

L1.-.Apparatus. for assembling; a= commutator having a tubular hub upon a shaft hav.-

ingfxar commutator receiving' portion and a portion ofi smaller' diameter'tlan.-thacoml mutator receiving` portion locatedv between anaend of the shaft: and the commutator receivingf4 portion, comprising in'. combination, a tube. fbr temporarily= holdin'gfthef commu'- tator and adapted: to receive thev ahaift'` pontionzof'smaller diametergastrip er supporting andf guiding the-tube.` and a a-pted toen gage" an endzof the cominutatorymeamsflimiting relative movement betweenthe tube and the stripper means for! support/ingtheshwt in alignment with the tube; and: means for producing relative `movement between the shaft and the tube and' strippen whereby the commutator wille be located' around theshatft and adjacent. the commute-tor' receiving por,- tion thereof, andi then the strippen willi lcause the commutator' to bey transferred: from the tube to the commutatory receiving ponttm' of 'the shaft.

5: Apparatus fon assembling a commutator having. a tubular hub uponY ai shaifthavingn au commutator receiving portion` and@ a portion of smaller diameten than theieommutator receiving; portion locatedibetween any end' ofthe shaft andthe commutator. re-

ceiving; portion, comprising inA combination, a tube fortemporarilyholdi rthvefcommu'- tator andy adapted to` receive t e shaft-:pontion ef'smaller. diameter;` a tubular stnipper ris supporting and guiding seid eommutator supporting tube and adapted to' engage an end of the commutator; a spring within the stripper for urging the tube outwardly from the stripper; means for limiting the outward l the tube and stripper whereby the commutator will be located around the shaft and adjacent the commutator receiving portion thereof, and then the stripper will cause the oommutator to be transferred from the tube to the commutator receiving portieri of the if' LORA E; POOLE. 

